Okay, so I made this cake, and frosting, Cake is coming out decent. Only thing with that is the brownies I used instead of chocolate cake isn't cooking as fast.

But the frosting! Oh god the frosting. It tastes AMAZING! But, I wasn't thinking and melted the butter, so now I have a liquid frosting!!!! I put it in the freezer to cool it, in hope the butter solidifies! Any suggestions? Rather than not being a dumb fuck up?